The opposite of a push. When management deliberately makes a wrestler look weak, unimportant, or foolish. Constant losses, humiliating segments, getting squashed by someone the crowd doesn't care about. Sometimes it's punishment, sometimes it's creative having nothing for you, sometimes it's politics. The internet uses 'buried' too loosely — losing one match isn't a burial. Losing every match for six months is.
"They buried him so hard after that backstage incident that he went from main eventing to not even being on the show."